McQuay MFU-C Product Manual page 21

AUTO-DIAGNOSIS
Led Blinking 7: Ambient temperature sensor incorrect operation.
Led Blinking 8: Water temperature sensor incorrect operation.
Led Blinking 5: Fan Coil / Chiller conflicting mode selection (when the system works on cool mode and the
water temperature is above 25°C, or when the system works on heat mode and the water
temperature is blow 25° C, t he system conside it as the mode conflict, at the same time, the
system will shut off all outputs and the LED will blink.)
CHILLED WATER FAN COILS – McQuay
20